Implement direct allocation in old data space infrastructure.

src/macro-assembler.h

Index: src/macro-assembler.h
diff --git a/src/macro-assembler.h b/src/macro-assembler.h
index 55dccfa95041330db89872895801f049f54fcfbf..9fdf2ee7d8616a63ef86db786ed59390dfb15de2 100644
--- a/src/macro-assembler.h
+++ b/src/macro-assembler.h
@@ -51,7 +51,9 @@ enum AllocationFlags {
   // Align the allocation to a multiple of kDoubleSize
   DOUBLE_ALIGNMENT = 1 << 3,
   // Directly allocate in old pointer space
-  PRETENURE_OLD_POINTER_SPACE = 1 << 4
+  PRETENURE_OLD_POINTER_SPACE = 1 << 4,
+  // Directly allocate in old data space
+  PRETENURE_OLD_DATA_SPACE = 1 << 5
 };
 
 
@@ -175,17 +177,26 @@ class AllocationUtils {
  public:
   static ExternalReference GetAllocationTopReference(
       Isolate* isolate, AllocationFlags flags) {
-    return ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) ?
-        ExternalReference::old_pointer_space_allocation_top_address(isolate) :
-        ExternalReference::new_space_allocation_top_address(isolate);
+    if ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) {
+      return ExternalReference::old_pointer_space_allocation_top_address(
+          isolate);
+    } else if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
+      return ExternalReference::old_data_space_allocation_top_address(isolate);
+    }
+    return ExternalReference::new_space_allocation_top_address(isolate);
   }
 
 
   static ExternalReference GetAllocationLimitReference(
       Isolate* isolate, AllocationFlags flags) {
-    return ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) ?
-        ExternalReference::old_pointer_space_allocation_limit_address(isolate) :
-        ExternalReference::new_space_allocation_limit_address(isolate);
+    if ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) {
+      return ExternalReference::old_pointer_space_allocation_limit_address(
+          isolate);
+    } else if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
+      return ExternalReference::old_data_space_allocation_limit_address(
+          isolate);
+    }
+    return ExternalReference::new_space_allocation_limit_address(isolate);
   }
 };